Looking good! I like how your Tach is already @ redline. lol
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what gear box are you running again ?
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i just had an idea...
early 12A twin dizzy front cover modified to accept 2 FC crank angle sensors. would allow you to run all 8 ignition circuits induvidually for poper leading/trailing including split. i just happen to have one sitting here, the CAS fits fine but would need a timing lock tab welded on. i will have to check the depth but spacer rings could probably be made easy enough if it isn't just right. figure this may be one option i use and just run 2 microtech units, treating the engine as 2 separate halves. wish i had more time to work on the damn thing though! |
Been lurking this thread for quite awhile. I must say the quality of work in here is outstanding!
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bad idea, 2nd CAS blocks the water pump inlet/outlet. could run an electric water pump... hmm. sorry, just thinking out loud.
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Vi-pec v88 runs 4 rotors.
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Loving your build. Your a skilled man my friend.
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Been watching this build on and off since the beginning. Wonderful stuff going on. I must say it's nice to see the chassis and body coming together now. Keep on it dude.
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almost as excited to see this car finished as i am my own car!
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While your at it, don't forget to put in useful cup holders!
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Originally Posted by Havoc
(Post 11274234)
what gear box are you running again ?
Originally Posted by RotaryEvolution
(Post 11274885)
i just had an idea...
early 12A twin dizzy front cover modified to accept 2 FC crank angle sensors. would allow you to run all 8 ignition circuits induvidually for poper leading/trailing including split. i just happen to have one sitting here, the CAS fits fine but would need a timing lock tab welded on. i will have to check the depth but spacer rings could probably be made easy enough if it isn't just right. figure this may be one option i use and just run 2 microtech units, treating the engine as 2 separate halves. wish i had more time to work on the damn thing though! Why go trough all the trouble adapting a second cas? Isn't it easier to just add an external triggerwheel, fabricate 2 brackets, and just fit 2 sensors? I'm also running an external triggerwheel. Anyway I don't see the need for running 2 ecu's, even if you really want to use split timing there are ecu's that can do it, Hell, I think even megasquirt can do it.
Originally Posted by Matt12123343
(Post 11276005)
While your at it, don't forget to put in useful cup holders!
That's not such a bad idea really :) Update Today was a slow rainy sunday, so I locked myself up in the machine shop and started making shiny suspension parts :nod: I started with the lower control arms, those flexy rubber bushings had to go, I'm going with bearings! https://lh5.googleusercontent.com/-I...2/CIMG2653.JPG Couldn't finish it today though :(, the lower control arms themselves also need a little bit of machining, but they are a little bit too big for my lathe, it was really close though. Ah well, I'll take them over to my buddy who has a bigger lathe soon. In the meantime I'm drawing up more parts, in this case camberplates, since my coilovers don't have them. I could probably also get these from tein or somewhere but where's the fun in that :) https://lh3.googleusercontent.com/-J...amberplate.JPG |
Simply amazing. :)
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John, have you seen how Supernow approached that bushing? Are you just replacing the entire width of the original bearing?
Supernow Link |
More beautiful results my friend, keep em coming
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Originally Posted by RotaryEvolution
(Post 11274885)
i just had an idea...
early 12A twin dizzy front cover modified to accept 2 FC crank angle sensors. would allow you to run all 8 ignition circuits induvidually for poper leading/trailing including split. i just happen to have one sitting here, the CAS fits fine but would need a timing lock tab welded on. i will have to check the depth but spacer rings could probably be made easy enough if it isn't just right. figure this may be one option i use and just run 2 microtech units, treating the engine as 2 separate halves. wish i had more time to work on the damn thing though! that white JC cosmo with the 20B PP engine is running THREE power FC's... the japanese LOVE that ecu... |
Originally Posted by CS13B
(Post 11276735)
John, have you seen how Supernow approached that bushing? Are you just replacing the entire width of the original bearing?
Supernow Link
Originally Posted by j9fd3s
(Post 11277244)
actually i think you could split the CAS signal, and run two ECU's on the single CAS, i think that's how the scoot 4 rotor is. stock FD CAS with 2 power FC's.
that white JC cosmo with the 20B PP engine is running THREE power FC's... the japanese LOVE that ecu... |
Originally Posted by John Huijben
(Post 11277587)
Wow, sounds like a horribly inefficient solution to a pretty simple problem :), they must really love those ecu's.
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most ECUs haven't adopted the 4 rotor platform and don't have the capability to run all 8 ignition channels with the split. i was just thinking about it and figured it was an option. i don't see a problem running 2 ECUs though if it could be done with a single ECU that's great.
i'm just thrifty like that, having an LT8 already another would be cheaper than some of the pricey units that could do the job. i'd hate to be knee deep in and have some issues that required everything to go back to the drawing board while all the shiny bits collect dust. |
Originally Posted by RotaryEvolution
(Post 11277617)
most ECUs haven't adopted the 4 rotor platform and don't have the capability to run all 8 ignition channels with the split. i was just thinking about it and figured it was an option. i don't see a problem running 2 ECUs though if it could be done with a single ECU that's great.
i'm just thrifty like that, having an LT8 already another would be cheaper than some of the pricey units that could do the job. i'd hate to be knee deep in and have some issues that required everything to go back to the drawing board while all the shiny bits collect dust. |
Originally Posted by John Huijben
(Post 11276599)
we learned the hard way that the spherical bearing needs to be a pretty tight fit, any movement = clunking noises |
Originally Posted by j9fd3s
(Post 11277599)
it IS accurate, but yeah on a 4 rotor, two ecu's kind of make sense, but 3 ecu's on a three rotor is kind of silly
Originally Posted by RotaryEvolution
(Post 11277617)
most ECUs haven't adopted the 4 rotor platform and don't have the capability to run all 8 ignition channels with the split. i was just thinking about it and figured it was an option. i don't see a problem running 2 ECUs though if it could be done with a single ECU that's great.
i'm just thrifty like that, having an LT8 already another would be cheaper than some of the pricey units that could do the job. i'd hate to be knee deep in and have some issues that required everything to go back to the drawing board while all the shiny bits collect dust.
Originally Posted by j9fd3s
(Post 11278443)
nice drawing! actually the interior of the car turned out really nice too, its all business
we learned the hard way that the spherical bearing needs to be a pretty tight fit, any movement = clunking noises |
Originally Posted by John Huijben
(Post 11278739)
I didn't mean that 3 ecu's wouldn't be accurate, just soo expensive and like you already said, silly :). I wonder if they also used 3 programming laptops and 3 tuners to tune it :lol:.
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https://lh5.googleusercontent.com/--...2/CIMG2643.JPG
John, your car is already redlining. It's like the body wants the motor in it already. Give it what it wants, John. |
a single CAS could be used if the rotor phasing was the same, but a 90* phased engine would require 2 separate inputs for TDC, a trigger wheel would probably be best but the microtech doesn't support it... i doubt i will use the microtech units given that the CAS idea was pitched out the window. as you said it would be much simpler to run a single ECU for making any adjustment.
if it were phased to fire 2 rotors at the same time it would be so much simpler but i don't want to go through the effort for that setup on the engine. |
Microtech supports some trigger wheel functions, I think they started allowing use of the RX-8 trigger wheels in 13B's, and they sell crank trigger kits for different models. You could use dual 180* offset trigger wheels if you really wanted to use the 2 LT's, or ask them about programming for a custom one.
Once again John, build is looking great! If you decide to save yourself some labour, you could go with the ground control camber plates: http://www.ground-control-store.com/.../CCP7II_fs.jpg They seem to be a well-built unit, I have some for my FC. |
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